/*---------------------------------------------------------------------------
 * 2005 NORSYS
 * main author : nono
 *
 * This software is a computer program whose purpose is to provide abstraction
 * for accessing directory data sources within java applications.
 *
 * This software is governed by the CeCILL  license under French law and
 * abiding by the rules of distribution of free software.  You can  use, 
 * modify and/ or redistribute the software under the terms of the CeCILL
 * license as circulated by CEA, CNRS and INRIA at the following URL
 * "http://www.cecill.info". 
 *
 * As a counterpart to the access to the source code and  rights to copy,
 * modify and redistribute granted by the license, users are provided only
 * with a limited warranty  and the software's author,  the holder of the
 * economic rights,  and the successive licensors  have only  limited
 * liability. 
 *
 * In this respect, the user's attention is drawn to the risks associated
 * with loading,  using,  modifying and/or developing or reproducing the
 * software by the user in light of its specific status of free software,
 * that may mean  that it is complicated to manipulate,  and  that  also
 * therefore means  that it is reserved for developers  and  experienced
 * professionals having in-depth computer knowledge. Users are therefore
 * encouraged to load and test the software's suitability as regards their
 * requirements in conditions enabling the security of their systems and/or 
 * data to be ensured and,  more generally, to use and operate it in the 
 * same conditions as regards security. 
 *
 * The fact that you are presently reading this means that you have had
 * knowledge of the CeCILL license and that you accept its terms.
 *
 * Created on Nov 3, 2005
 * --------------------------------------------------------------------------*/

package speculoos;

import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.Attribute;
import javax.naming.directory.Attributes;

import org.jmock.core.Constraint;

/**
 * Implementation of constraint that check for inclusion of JNDI 
 * attributes. 
 * The eval method checks that given attributes are included in the 
 * attributes given at construction time. Attributes' values must be
 * included in the expected attribute's values 
 * and there may be less attributes given than expected.
 * 
 * @author nono
 * @version $Id$
 */
public class IncludedInAttributes implements Constraint {

	Attributes attrs;
	
	public IncludedInAttributes(Attributes attrs ){
		this.attrs = attrs;
	}
	
	public boolean eval(Object arg0) {
		Attributes ar;
		try {
			ar = (Attributes)arg0;
		}catch(ClassCastException e) {
			return false;
		}
		for(NamingEnumeration ne = ar.getAll();ne.hasMoreElements();) {
			Attribute at = (Attribute)ne.nextElement();
			Attribute art = attrs.get(at.getID());
			if(art == null)
				return false;
			/* 
			 * check equality of values. 
			 */
			try {
				for(NamingEnumeration val = at.getAll();val.hasMoreElements();) {
					if(!art.contains(val.nextElement()))
						return false;
				}
			} catch (NamingException e) {
				return false;
			}
			
		}
		return true;
	}

	public StringBuffer describeTo(StringBuffer arg0) {
		return arg0.append(attrs);
	}
	
}